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| 1 /* | |
| 2 * Copyright (C) 2006-2008 The Android Open Source Project | |
| 3 * | |
| 4 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 * you may not use this file except in compliance with the License. | |
| 6 * You may obtain a copy of the License at | |
| 7 * | |
| 8 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 * | |
| 10 * Unless required by applicable law or agreed to in writing, software | |
| 11 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 * See the License for the specific language governing permissions and | |
| 14 * limitations under the License. | |
| 15 */ | |
| 16 | |
| 17 #include "SkCanvas.h" | |
| 18 #include "SkBounder.h" | |
| 19 #include "SkDevice.h" | |
| 20 #include "SkDraw.h" | |
| 21 #include "SkDrawFilter.h" | |
| 22 #include "SkDrawLooper.h" | |
| 23 #include "SkPicture.h" | |
| 24 #include "SkScalarCompare.h" | |
| 25 #include "SkTemplates.h" | |
| 26 #include "SkUtils.h" | |
| 27 #include <new> | |
| 28 | |
| 29 //#define SK_TRACE_SAVERESTORE | |
| 30 | |
| 31 #ifdef SK_TRACE_SAVERESTORE | |
| 32 static int gLayerCounter; | |
| 33 static void inc_layer() { ++gLayerCounter; printf("----- inc layer %d\n", gL
ayerCounter); } | |
| 34 static void dec_layer() { --gLayerCounter; printf("----- dec layer %d\n", gL
ayerCounter); } | |
| 35 | |
| 36 static int gRecCounter; | |
| 37 static void inc_rec() { ++gRecCounter; printf("----- inc rec %d\n", gRecCoun
ter); } | |
| 38 static void dec_rec() { --gRecCounter; printf("----- dec rec %d\n", gRecCoun
ter); } | |
| 39 | |
| 40 static int gCanvasCounter; | |
| 41 static void inc_canvas() { ++gCanvasCounter; printf("----- inc canvas %d\n",
gCanvasCounter); } | |
| 42 static void dec_canvas() { --gCanvasCounter; printf("----- dec canvas %d\n",
gCanvasCounter); } | |
| 43 #else | |
| 44 #define inc_layer() | |
| 45 #define dec_layer() | |
| 46 #define inc_rec() | |
| 47 #define dec_rec() | |
| 48 #define inc_canvas() | |
| 49 #define dec_canvas() | |
| 50 #endif | |
| 51 | |
| 52 /////////////////////////////////////////////////////////////////////////////// | |
| 53 // Helpers for computing fast bounds for quickReject tests | |
| 54 | |
| 55 static SkCanvas::EdgeType paint2EdgeType(const SkPaint* paint) { | |
| 56 return paint != NULL && paint->isAntiAlias() ? | |
| 57 SkCanvas::kAA_EdgeType : SkCanvas::kBW_EdgeType; | |
| 58 } | |
| 59 | |
| 60 /////////////////////////////////////////////////////////////////////////////// | |
| 61 | |
| 62 /* This is the record we keep for each SkDevice that the user installs. | |
| 63 The clip/matrix/proc are fields that reflect the top of the save/restore | |
| 64 stack. Whenever the canvas changes, it marks a dirty flag, and then before | |
| 65 these are used (assuming we're not on a layer) we rebuild these cache | |
| 66 values: they reflect the top of the save stack, but translated and clipped | |
| 67 by the device's XY offset and bitmap-bounds. | |
| 68 */ | |
| 69 struct DeviceCM { | |
| 70 DeviceCM* fNext; | |
| 71 SkDevice* fDevice; | |
| 72 SkRegion fClip; | |
| 73 const SkMatrix* fMatrix; | |
| 74 SkPaint* fPaint; // may be null (in the future) | |
| 75 int16_t fX, fY; // relative to base matrix/clip | |
| 76 | |
| 77 DeviceCM(SkDevice* device, int x, int y, const SkPaint* paint) | |
| 78 : fNext(NULL) { | |
| 79 if (NULL != device) { | |
| 80 device->ref(); | |
| 81 device->lockPixels(); | |
| 82 } | |
| 83 fDevice = device; | |
| 84 fX = SkToS16(x); | |
| 85 fY = SkToS16(y); | |
| 86 fPaint = paint ? SkNEW_ARGS(SkPaint, (*paint)) : NULL; | |
| 87 } | |
| 88 | |
| 89 ~DeviceCM() { | |
| 90 if (NULL != fDevice) { | |
| 91 fDevice->unlockPixels(); | |
| 92 fDevice->unref(); | |
| 93 } | |
| 94 SkDELETE(fPaint); | |
| 95 } | |
| 96 | |
| 97 void updateMC(const SkMatrix& totalMatrix, const SkRegion& totalClip, | |
| 98 SkRegion* updateClip) { | |
| 99 int x = fX; | |
| 100 int y = fY; | |
| 101 int width = fDevice->width(); | |
| 102 int height = fDevice->height(); | |
| 103 | |
| 104 if ((x | y) == 0) { | |
| 105 fMatrix = &totalMatrix; | |
| 106 fClip = totalClip; | |
| 107 } else { | |
| 108 fMatrixStorage = totalMatrix; | |
| 109 fMatrixStorage.postTranslate(SkIntToScalar(-x), | |
| 110 SkIntToScalar(-y)); | |
| 111 fMatrix = &fMatrixStorage; | |
| 112 | |
| 113 totalClip.translate(-x, -y, &fClip); | |
| 114 } | |
| 115 | |
| 116 fClip.op(0, 0, width, height, SkRegion::kIntersect_Op); | |
| 117 | |
| 118 // intersect clip, but don't translate it (yet) | |
| 119 | |
| 120 if (updateClip) { | |
| 121 updateClip->op(x, y, x + width, y + height, | |
| 122 SkRegion::kDifference_Op); | |
| 123 } | |
| 124 | |
| 125 fDevice->setMatrixClip(*fMatrix, fClip); | |
| 126 | |
| 127 #ifdef SK_DEBUG | |
| 128 if (!fClip.isEmpty()) { | |
| 129 SkIRect deviceR; | |
| 130 deviceR.set(0, 0, width, height); | |
| 131 SkASSERT(deviceR.contains(fClip.getBounds())); | |
| 132 } | |
| 133 #endif | |
| 134 } | |
| 135 | |
| 136 void translateClip() { | |
| 137 if (fX | fY) { | |
| 138 fClip.translate(fX, fY); | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 private: | |
| 143 SkMatrix fMatrixStorage; | |
| 144 }; | |
| 145 | |
| 146 /* This is the record we keep for each save/restore level in the stack. | |
| 147 Since a level optionally copies the matrix and/or stack, we have pointers | |
| 148 for these fields. If the value is copied for this level, the copy is | |
| 149 stored in the ...Storage field, and the pointer points to that. If the | |
| 150 value is not copied for this level, we ignore ...Storage, and just point | |
| 151 at the corresponding value in the previous level in the stack. | |
| 152 */ | |
| 153 class SkCanvas::MCRec { | |
| 154 public: | |
| 155 MCRec* fNext; | |
| 156 SkMatrix* fMatrix; // points to either fMatrixStorage or prev MCRec | |
| 157 SkRegion* fRegion; // points to either fRegionStorage or prev MCRec | |
| 158 SkDrawFilter* fFilter; // the current filter (or null) | |
| 159 | |
| 160 DeviceCM* fLayer; | |
| 161 /* If there are any layers in the stack, this points to the top-most | |
| 162 one that is at or below this level in the stack (so we know what | |
| 163 bitmap/device to draw into from this level. This value is NOT | |
| 164 reference counted, since the real owner is either our fLayer field, | |
| 165 or a previous one in a lower level.) | |
| 166 */ | |
| 167 DeviceCM* fTopLayer; | |
| 168 | |
| 169 MCRec(const MCRec* prev, int flags) { | |
| 170 if (NULL != prev) { | |
| 171 if (flags & SkCanvas::kMatrix_SaveFlag) { | |
| 172 fMatrixStorage = *prev->fMatrix; | |
| 173 fMatrix = &fMatrixStorage; | |
| 174 } else { | |
| 175 fMatrix = prev->fMatrix; | |
| 176 } | |
| 177 | |
| 178 if (flags & SkCanvas::kClip_SaveFlag) { | |
| 179 fRegionStorage = *prev->fRegion; | |
| 180 fRegion = &fRegionStorage; | |
| 181 } else { | |
| 182 fRegion = prev->fRegion; | |
| 183 } | |
| 184 | |
| 185 fFilter = prev->fFilter; | |
| 186 fFilter->safeRef(); | |
| 187 | |
| 188 fTopLayer = prev->fTopLayer; | |
| 189 } else { // no prev | |
| 190 fMatrixStorage.reset(); | |
| 191 | |
| 192 fMatrix = &fMatrixStorage; | |
| 193 fRegion = &fRegionStorage; | |
| 194 fFilter = NULL; | |
| 195 fTopLayer = NULL; | |
| 196 } | |
| 197 fLayer = NULL; | |
| 198 | |
| 199 // don't bother initializing fNext | |
| 200 inc_rec(); | |
| 201 } | |
| 202 ~MCRec() { | |
| 203 fFilter->safeUnref(); | |
| 204 SkDELETE(fLayer); | |
| 205 dec_rec(); | |
| 206 } | |
| 207 | |
| 208 private: | |
| 209 SkMatrix fMatrixStorage; | |
| 210 SkRegion fRegionStorage; | |
| 211 }; | |
| 212 | |
| 213 class SkDrawIter : public SkDraw { | |
| 214 public: | |
| 215 SkDrawIter(SkCanvas* canvas, bool skipEmptyClips = true) { | |
| 216 fCanvas = canvas; | |
| 217 canvas->updateDeviceCMCache(); | |
| 218 | |
| 219 fBounder = canvas->getBounder(); | |
| 220 fCurrLayer = canvas->fMCRec->fTopLayer; | |
| 221 fSkipEmptyClips = skipEmptyClips; | |
| 222 } | |
| 223 | |
| 224 bool next() { | |
| 225 // skip over recs with empty clips | |
| 226 if (fSkipEmptyClips) { | |
| 227 while (fCurrLayer && fCurrLayer->fClip.isEmpty()) { | |
| 228 fCurrLayer = fCurrLayer->fNext; | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 if (NULL != fCurrLayer) { | |
| 233 const DeviceCM* rec = fCurrLayer; | |
| 234 | |
| 235 fMatrix = rec->fMatrix; | |
| 236 fClip = &rec->fClip; | |
| 237 fDevice = rec->fDevice; | |
| 238 fBitmap = &fDevice->accessBitmap(true); | |
| 239 fLayerX = rec->fX; | |
| 240 fLayerY = rec->fY; | |
| 241 fPaint = rec->fPaint; | |
| 242 SkDEBUGCODE(this->validate();) | |
| 243 | |
| 244 fCurrLayer = rec->fNext; | |
| 245 if (fBounder) { | |
| 246 fBounder->setClip(fClip); | |
| 247 } | |
| 248 | |
| 249 // fCurrLayer may be NULL now | |
| 250 | |
| 251 fCanvas->prepareForDeviceDraw(fDevice); | |
| 252 return true; | |
| 253 } | |
| 254 return false; | |
| 255 } | |
| 256 | |
| 257 int getX() const { return fLayerX; } | |
| 258 int getY() const { return fLayerY; } | |
| 259 SkDevice* getDevice() const { return fDevice; } | |
| 260 const SkMatrix& getMatrix() const { return *fMatrix; } | |
| 261 const SkRegion& getClip() const { return *fClip; } | |
| 262 const SkPaint* getPaint() const { return fPaint; } | |
| 263 private: | |
| 264 SkCanvas* fCanvas; | |
| 265 const DeviceCM* fCurrLayer; | |
| 266 const SkPaint* fPaint; // May be null. | |
| 267 int fLayerX; | |
| 268 int fLayerY; | |
| 269 SkBool8 fSkipEmptyClips; | |
| 270 | |
| 271 typedef SkDraw INHERITED; | |
| 272 }; | |
| 273 | |
| 274 ///////////////////////////////////////////////////////////////////////////// | |
| 275 | |
| 276 class AutoDrawLooper { | |
| 277 public: | |
| 278 AutoDrawLooper(SkCanvas* canvas, const SkPaint& paint, SkDrawFilter::Type t) | |
| 279 : fCanvas(canvas), fPaint((SkPaint*)&paint), fType(t) { | |
| 280 if ((fLooper = paint.getLooper()) != NULL) { | |
| 281 fLooper->init(canvas, (SkPaint*)&paint); | |
| 282 } else { | |
| 283 fOnce = true; | |
| 284 } | |
| 285 fFilter = canvas->getDrawFilter(); | |
| 286 fNeedFilterRestore = false; | |
| 287 } | |
| 288 | |
| 289 ~AutoDrawLooper() { | |
| 290 if (fNeedFilterRestore) { | |
| 291 SkASSERT(fFilter); | |
| 292 fFilter->restore(fCanvas, fPaint, fType); | |
| 293 } | |
| 294 if (NULL != fLooper) { | |
| 295 fLooper->restore(); | |
| 296 } | |
| 297 } | |
| 298 | |
| 299 bool next() { | |
| 300 SkDrawFilter* filter = fFilter; | |
| 301 | |
| 302 // if we drew earlier with a filter, then we need to restore first | |
| 303 if (fNeedFilterRestore) { | |
| 304 SkASSERT(filter); | |
| 305 filter->restore(fCanvas, fPaint, fType); | |
| 306 fNeedFilterRestore = false; | |
| 307 } | |
| 308 | |
| 309 bool result; | |
| 310 | |
| 311 if (NULL != fLooper) { | |
| 312 result = fLooper->next(); | |
| 313 } else { | |
| 314 result = fOnce; | |
| 315 fOnce = false; | |
| 316 } | |
| 317 | |
| 318 // if we're gonna draw, give the filter a chance to do its work | |
| 319 if (result && NULL != filter) { | |
| 320 fNeedFilterRestore = result = filter->filter(fCanvas, fPaint, | |
| 321 fType); | |
| 322 } | |
| 323 return result; | |
| 324 } | |
| 325 | |
| 326 private: | |
| 327 SkDrawLooper* fLooper; | |
| 328 SkDrawFilter* fFilter; | |
| 329 SkCanvas* fCanvas; | |
| 330 SkPaint* fPaint; | |
| 331 SkDrawFilter::Type fType; | |
| 332 bool fOnce; | |
| 333 bool fNeedFilterRestore; | |
| 334 | |
| 335 }; | |
| 336 | |
| 337 /* Stack helper for managing a SkBounder. In the destructor, if we were | |
| 338 given a bounder, we call its commit() method, signifying that we are | |
| 339 done accumulating bounds for that draw. | |
| 340 */ | |
| 341 class SkAutoBounderCommit { | |
| 342 public: | |
| 343 SkAutoBounderCommit(SkBounder* bounder) : fBounder(bounder) {} | |
| 344 ~SkAutoBounderCommit() { | |
| 345 if (NULL != fBounder) { | |
| 346 fBounder->commit(); | |
| 347 } | |
| 348 } | |
| 349 private: | |
| 350 SkBounder* fBounder; | |
| 351 }; | |
| 352 | |
| 353 #include "SkColorPriv.h" | |
| 354 | |
| 355 class AutoValidator { | |
| 356 public: | |
| 357 AutoValidator(SkDevice* device) : fDevice(device) {} | |
| 358 ~AutoValidator() { | |
| 359 #ifdef SK_DEBUG | |
| 360 const SkBitmap& bm = fDevice->accessBitmap(false); | |
| 361 if (bm.config() == SkBitmap::kARGB_4444_Config) { | |
| 362 for (int y = 0; y < bm.height(); y++) { | |
| 363 const SkPMColor16* p = bm.getAddr16(0, y); | |
| 364 for (int x = 0; x < bm.width(); x++) { | |
| 365 SkPMColor16 c = p[x]; | |
| 366 SkPMColor16Assert(c); | |
| 367 } | |
| 368 } | |
| 369 } | |
| 370 #endif | |
| 371 } | |
| 372 private: | |
| 373 SkDevice* fDevice; | |
| 374 }; | |
| 375 | |
| 376 ////////// macros to place around the internal draw calls ////////////////// | |
| 377 | |
| 378 #define ITER_BEGIN(paint, type) \ | |
| 379 /* AutoValidator validator(fMCRec->fTopLayer->fDevice); */ \ | |
| 380 AutoDrawLooper looper(this, paint, type); \ | |
| 381 while (looper.next()) { \ | |
| 382 SkAutoBounderCommit ac(fBounder); \ | |
| 383 SkDrawIter iter(this); | |
| 384 | |
| 385 #define ITER_END } | |
| 386 | |
| 387 //////////////////////////////////////////////////////////////////////////// | |
| 388 | |
| 389 SkDevice* SkCanvas::init(SkDevice* device) { | |
| 390 fBounder = NULL; | |
| 391 fLocalBoundsCompareTypeDirty = true; | |
| 392 | |
| 393 fMCRec = (MCRec*)fMCStack.push_back(); | |
| 394 new (fMCRec) MCRec(NULL, 0); | |
| 395 | |
| 396 fMCRec->fLayer = SkNEW_ARGS(DeviceCM, (NULL, 0, 0, NULL)); | |
| 397 fMCRec->fTopLayer = fMCRec->fLayer; | |
| 398 fMCRec->fNext = NULL; | |
| 399 | |
| 400 return this->setDevice(device); | |
| 401 } | |
| 402 | |
| 403 SkCanvas::SkCanvas(SkDevice* device) | |
| 404 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { | |
| 405 inc_canvas(); | |
| 406 | |
| 407 this->init(device); | |
| 408 } | |
| 409 | |
| 410 SkCanvas::SkCanvas(const SkBitmap& bitmap) | |
| 411 : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { | |
| 412 inc_canvas(); | |
| 413 | |
| 414 this->init(SkNEW_ARGS(SkDevice, (bitmap)))->unref(); | |
| 415 } | |
| 416 | |
| 417 SkCanvas::~SkCanvas() { | |
| 418 // free up the contents of our deque | |
| 419 this->restoreToCount(1); // restore everything but the last | |
| 420 this->internalRestore(); // restore the last, since we're going away | |
| 421 | |
| 422 fBounder->safeUnref(); | |
| 423 | |
| 424 dec_canvas(); | |
| 425 } | |
| 426 | |
| 427 SkBounder* SkCanvas::setBounder(SkBounder* bounder) { | |
| 428 SkRefCnt_SafeAssign(fBounder, bounder); | |
| 429 return bounder; | |
| 430 } | |
| 431 | |
| 432 SkDrawFilter* SkCanvas::getDrawFilter() const { | |
| 433 return fMCRec->fFilter; | |
| 434 } | |
| 435 | |
| 436 SkDrawFilter* SkCanvas::setDrawFilter(SkDrawFilter* filter) { | |
| 437 SkRefCnt_SafeAssign(fMCRec->fFilter, filter); | |
| 438 return filter; | |
| 439 } | |
| 440 | |
| 441 /////////////////////////////////////////////////////////////////////////////// | |
| 442 | |
| 443 SkDevice* SkCanvas::getDevice() const { | |
| 444 // return root device | |
| 445 SkDeque::Iter iter(fMCStack); | |
| 446 MCRec* rec = (MCRec*)iter.next(); | |
| 447 SkASSERT(rec && rec->fLayer); | |
| 448 return rec->fLayer->fDevice; | |
| 449 } | |
| 450 | |
| 451 SkDevice* SkCanvas::setDevice(SkDevice* device) { | |
| 452 // return root device | |
| 453 SkDeque::Iter iter(fMCStack); | |
| 454 MCRec* rec = (MCRec*)iter.next(); | |
| 455 SkASSERT(rec && rec->fLayer); | |
| 456 SkDevice* rootDevice = rec->fLayer->fDevice; | |
| 457 | |
| 458 if (rootDevice == device) { | |
| 459 return device; | |
| 460 } | |
| 461 | |
| 462 /* Notify the devices that they are going in/out of scope, so they can do | |
| 463 things like lock/unlock their pixels, etc. | |
| 464 */ | |
| 465 if (device) { | |
| 466 device->lockPixels(); | |
| 467 } | |
| 468 if (rootDevice) { | |
| 469 rootDevice->unlockPixels(); | |
| 470 } | |
| 471 | |
| 472 SkRefCnt_SafeAssign(rec->fLayer->fDevice, device); | |
| 473 rootDevice = device; | |
| 474 | |
| 475 fDeviceCMDirty = true; | |
| 476 | |
| 477 /* Now we update our initial region to have the bounds of the new device, | |
| 478 and then intersect all of the clips in our stack with these bounds, | |
| 479 to ensure that we can't draw outside of the device's bounds (and trash | |
| 480 memory). | |
| 481 | |
| 482 NOTE: this is only a partial-fix, since if the new device is larger than | |
| 483 the previous one, we don't know how to "enlarge" the clips in our stack, | |
| 484 so drawing may be artificially restricted. Without keeping a history of | |
| 485 all calls to canvas->clipRect() and canvas->clipPath(), we can't exactly | |
| 486 reconstruct the correct clips, so this approximation will have to do. | |
| 487 The caller really needs to restore() back to the base if they want to | |
| 488 accurately take advantage of the new device bounds. | |
| 489 */ | |
| 490 | |
| 491 if (NULL == device) { | |
| 492 rec->fRegion->setEmpty(); | |
| 493 while ((rec = (MCRec*)iter.next()) != NULL) { | |
| 494 (void)rec->fRegion->setEmpty(); | |
| 495 } | |
| 496 } else { | |
| 497 // compute our total bounds for all devices | |
| 498 SkIRect bounds; | |
| 499 | |
| 500 bounds.set(0, 0, device->width(), device->height()); | |
| 501 | |
| 502 // now jam our 1st clip to be bounds, and intersect the rest with that | |
| 503 rec->fRegion->setRect(bounds); | |
| 504 while ((rec = (MCRec*)iter.next()) != NULL) { | |
| 505 (void)rec->fRegion->op(bounds, SkRegion::kIntersect_Op); | |
| 506 } | |
| 507 } | |
| 508 return device; | |
| 509 } | |
| 510 | |
| 511 SkDevice* SkCanvas::setBitmapDevice(const SkBitmap& bitmap) { | |
| 512 SkDevice* device = this->setDevice(SkNEW_ARGS(SkDevice, (bitmap))); | |
| 513 device->unref(); | |
| 514 return device; | |
| 515 } | |
| 516 | |
| 517 ////////////////////////////////////////////////////////////////////////////// | |
| 518 | |
| 519 bool SkCanvas::getViewport(SkIPoint* size) const { | |
| 520 return false; | |
| 521 } | |
| 522 | |
| 523 bool SkCanvas::setViewport(int width, int height) { | |
| 524 return false; | |
| 525 } | |
| 526 | |
| 527 void SkCanvas::updateDeviceCMCache() { | |
| 528 if (fDeviceCMDirty) { | |
| 529 const SkMatrix& totalMatrix = this->getTotalMatrix(); | |
| 530 const SkRegion& totalClip = this->getTotalClip(); | |
| 531 DeviceCM* layer = fMCRec->fTopLayer; | |
| 532 | |
| 533 if (NULL == layer->fNext) { // only one layer | |
| 534 layer->updateMC(totalMatrix, totalClip, NULL); | |
| 535 } else { | |
| 536 SkRegion clip; | |
| 537 clip = totalClip; // make a copy | |
| 538 do { | |
| 539 layer->updateMC(totalMatrix, clip, &clip); | |
| 540 } while ((layer = layer->fNext) != NULL); | |
| 541 } | |
| 542 fDeviceCMDirty = false; | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 void SkCanvas::prepareForDeviceDraw(SkDevice* device) { | |
| 547 SkASSERT(device); | |
| 548 device->gainFocus(this); | |
| 549 } | |
| 550 | |
| 551 /////////////////////////////////////////////////////////////////////////////// | |
| 552 | |
| 553 int SkCanvas::internalSave(SaveFlags flags) { | |
| 554 int saveCount = this->getSaveCount(); // record this before the actual save | |
| 555 | |
| 556 MCRec* newTop = (MCRec*)fMCStack.push_back(); | |
| 557 new (newTop) MCRec(fMCRec, flags); // balanced in restore() | |
| 558 | |
| 559 newTop->fNext = fMCRec; | |
| 560 fMCRec = newTop; | |
| 561 | |
| 562 return saveCount; | |
| 563 } | |
| 564 | |
| 565 int SkCanvas::save(SaveFlags flags) { | |
| 566 // call shared impl | |
| 567 return this->internalSave(flags); | |
| 568 } | |
| 569 | |
| 570 #define C32MASK (1 << SkBitmap::kARGB_8888_Config) | |
| 571 #define C16MASK (1 << SkBitmap::kRGB_565_Config) | |
| 572 #define C8MASK (1 << SkBitmap::kA8_Config) | |
| 573 | |
| 574 static SkBitmap::Config resolve_config(SkCanvas* canvas, | |
| 575 const SkIRect& bounds, | |
| 576 SkCanvas::SaveFlags flags, | |
| 577 bool* isOpaque) { | |
| 578 *isOpaque = (flags & SkCanvas::kHasAlphaLayer_SaveFlag) == 0; | |
| 579 | |
| 580 #if 0 | |
| 581 // loop through and union all the configs we may draw into | |
| 582 uint32_t configMask = 0; | |
| 583 for (int i = canvas->countLayerDevices() - 1; i >= 0; --i) | |
| 584 { | |
| 585 SkDevice* device = canvas->getLayerDevice(i); | |
| 586 if (device->intersects(bounds)) | |
| 587 configMask |= 1 << device->config(); | |
| 588 } | |
| 589 | |
| 590 // if the caller wants alpha or fullcolor, we can't return 565 | |
| 591 if (flags & (SkCanvas::kFullColorLayer_SaveFlag | | |
| 592 SkCanvas::kHasAlphaLayer_SaveFlag)) | |
| 593 configMask &= ~C16MASK; | |
| 594 | |
| 595 switch (configMask) { | |
| 596 case C8MASK: // if we only have A8, return that | |
| 597 return SkBitmap::kA8_Config; | |
| 598 | |
| 599 case C16MASK: // if we only have 565, return that | |
| 600 return SkBitmap::kRGB_565_Config; | |
| 601 | |
| 602 default: | |
| 603 return SkBitmap::kARGB_8888_Config; // default answer | |
| 604 } | |
| 605 #else | |
| 606 return SkBitmap::kARGB_8888_Config; // default answer | |
| 607 #endif | |
| 608 } | |
| 609 | |
| 610 static bool bounds_affects_clip(SkCanvas::SaveFlags flags) { | |
| 611 return (flags & SkCanvas::kClipToLayer_SaveFlag) != 0; | |
| 612 } | |
| 613 | |
| 614 int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint, | |
| 615 SaveFlags flags) { | |
| 616 // do this before we create the layer. We don't call the public save() since | |
| 617 // that would invoke a possibly overridden virtual | |
| 618 int count = this->internalSave(flags); | |
| 619 | |
| 620 fDeviceCMDirty = true; | |
| 621 | |
| 622 SkIRect ir; | |
| 623 const SkIRect& clipBounds = this->getTotalClip().getBounds(); | |
| 624 | |
| 625 if (NULL != bounds) { | |
| 626 SkRect r; | |
| 627 | |
| 628 this->getTotalMatrix().mapRect(&r, *bounds); | |
| 629 r.roundOut(&ir); | |
| 630 // early exit if the layer's bounds are clipped out | |
| 631 if (!ir.intersect(clipBounds)) { | |
| 632 if (bounds_affects_clip(flags)) | |
| 633 fMCRec->fRegion->setEmpty(); | |
| 634 return count; | |
| 635 } | |
| 636 } else { // no user bounds, so just use the clip | |
| 637 ir = clipBounds; | |
| 638 } | |
| 639 | |
| 640 // early exit if the clip is now empty | |
| 641 if (bounds_affects_clip(flags) && | |
| 642 !fMCRec->fRegion->op(ir, SkRegion::kIntersect_Op)) { | |
| 643 return count; | |
| 644 } | |
| 645 | |
| 646 bool isOpaque; | |
| 647 SkBitmap::Config config = resolve_config(this, ir, flags, &isOpaque); | |
| 648 | |
| 649 SkDevice* device = this->createDevice(config, ir.width(), ir.height(), | |
| 650 isOpaque, true); | |
| 651 DeviceCM* layer = SkNEW_ARGS(DeviceCM, (device, ir.fLeft, ir.fTop, paint)); | |
| 652 device->unref(); | |
| 653 | |
| 654 layer->fNext = fMCRec->fTopLayer; | |
| 655 fMCRec->fLayer = layer; | |
| 656 fMCRec->fTopLayer = layer; // this field is NOT an owner of layer | |
| 657 | |
| 658 return count; | |
| 659 } | |
| 660 | |
| 661 int SkCanvas::saveLayerAlpha(const SkRect* bounds, U8CPU alpha, | |
| 662 SaveFlags flags) { | |
| 663 if (0xFF == alpha) { | |
| 664 return this->saveLayer(bounds, NULL, flags); | |
| 665 } else { | |
| 666 SkPaint tmpPaint; | |
| 667 tmpPaint.setAlpha(alpha); | |
| 668 return this->saveLayer(bounds, &tmpPaint, flags); | |
| 669 } | |
| 670 } | |
| 671 | |
| 672 void SkCanvas::restore() { | |
| 673 // check for underflow | |
| 674 if (fMCStack.count() > 1) { | |
| 675 this->internalRestore(); | |
| 676 } | |
| 677 } | |
| 678 | |
| 679 void SkCanvas::internalRestore() { | |
| 680 SkASSERT(fMCStack.count() != 0); | |
| 681 | |
| 682 fDeviceCMDirty = true; | |
| 683 fLocalBoundsCompareTypeDirty = true; | |
| 684 | |
| 685 // reserve our layer (if any) | |
| 686 DeviceCM* layer = fMCRec->fLayer; // may be null | |
| 687 // now detach it from fMCRec so we can pop(). Gets freed after its drawn | |
| 688 fMCRec->fLayer = NULL; | |
| 689 | |
| 690 // now do the normal restore() | |
| 691 fMCRec->~MCRec(); // balanced in save() | |
| 692 fMCStack.pop_back(); | |
| 693 fMCRec = (MCRec*)fMCStack.back(); | |
| 694 | |
| 695 /* Time to draw the layer's offscreen. We can't call the public drawSprite, | |
| 696 since if we're being recorded, we don't want to record this (the | |
| 697 recorder will have already recorded the restore). | |
| 698 */ | |
| 699 if (NULL != layer) { | |
| 700 if (layer->fNext) { | |
| 701 this->drawDevice(layer->fDevice, layer->fX, layer->fY, | |
| 702 layer->fPaint); | |
| 703 // reset this, since drawDevice will have set it to true | |
| 704 fDeviceCMDirty = true; | |
| 705 } | |
| 706 SkDELETE(layer); | |
| 707 } | |
| 708 } | |
| 709 | |
| 710 int SkCanvas::getSaveCount() const { | |
| 711 return fMCStack.count(); | |
| 712 } | |
| 713 | |
| 714 void SkCanvas::restoreToCount(int count) { | |
| 715 // sanity check | |
| 716 if (count < 1) { | |
| 717 count = 1; | |
| 718 } | |
| 719 while (fMCStack.count() > count) { | |
| 720 this->restore(); | |
| 721 } | |
| 722 } | |
| 723 | |
| 724 ///////////////////////////////////////////////////////////////////////////// | |
| 725 | |
| 726 // can't draw it if its empty, or its too big for a fixed-point width or height | |
| 727 static bool reject_bitmap(const SkBitmap& bitmap) { | |
| 728 return bitmap.width() <= 0 || bitmap.height() <= 0 || | |
| 729 bitmap.width() > 32767 || bitmap.height() > 32767; | |
| 730 } | |
| 731 | |
| 732 void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, | |
| 733 const SkMatrix& matrix, const SkPaint* paint) { | |
| 734 if (reject_bitmap(bitmap)) { | |
| 735 return; | |
| 736 } | |
| 737 | |
| 738 if (NULL == paint) { | |
| 739 SkPaint tmpPaint; | |
| 740 this->commonDrawBitmap(bitmap, matrix, tmpPaint); | |
| 741 } else { | |
| 742 this->commonDrawBitmap(bitmap, matrix, *paint); | |
| 743 } | |
| 744 } | |
| 745 | |
| 746 void SkCanvas::drawDevice(SkDevice* device, int x, int y, | |
| 747 const SkPaint* paint) { | |
| 748 SkPaint tmp; | |
| 749 if (NULL == paint) { | |
| 750 tmp.setDither(true); | |
| 751 paint = &tmp; | |
| 752 } | |
| 753 | |
| 754 ITER_BEGIN(*paint, SkDrawFilter::kBitmap_Type) | |
| 755 while (iter.next()) { | |
| 756 iter.fDevice->drawDevice(iter, device, x - iter.getX(), y - iter.getY(), | |
| 757 *paint); | |
| 758 } | |
| 759 ITER_END | |
| 760 } | |
| 761 | |
| 762 ///////////////////////////////////////////////////////////////////////////// | |
| 763 | |
| 764 bool SkCanvas::translate(SkScalar dx, SkScalar dy) { | |
| 765 fDeviceCMDirty = true; | |
| 766 fLocalBoundsCompareTypeDirty = true; | |
| 767 return fMCRec->fMatrix->preTranslate(dx, dy); | |
| 768 } | |
| 769 | |
| 770 bool SkCanvas::scale(SkScalar sx, SkScalar sy) { | |
| 771 fDeviceCMDirty = true; | |
| 772 fLocalBoundsCompareTypeDirty = true; | |
| 773 return fMCRec->fMatrix->preScale(sx, sy); | |
| 774 } | |
| 775 | |
| 776 bool SkCanvas::rotate(SkScalar degrees) { | |
| 777 fDeviceCMDirty = true; | |
| 778 fLocalBoundsCompareTypeDirty = true; | |
| 779 return fMCRec->fMatrix->preRotate(degrees); | |
| 780 } | |
| 781 | |
| 782 bool SkCanvas::skew(SkScalar sx, SkScalar sy) { | |
| 783 fDeviceCMDirty = true; | |
| 784 fLocalBoundsCompareTypeDirty = true; | |
| 785 return fMCRec->fMatrix->preSkew(sx, sy); | |
| 786 } | |
| 787 | |
| 788 bool SkCanvas::concat(const SkMatrix& matrix) { | |
| 789 fDeviceCMDirty = true; | |
| 790 fLocalBoundsCompareTypeDirty = true; | |
| 791 return fMCRec->fMatrix->preConcat(matrix); | |
| 792 } | |
| 793 | |
| 794 void SkCanvas::setMatrix(const SkMatrix& matrix) { | |
| 795 fDeviceCMDirty = true; | |
| 796 fLocalBoundsCompareTypeDirty = true; | |
| 797 *fMCRec->fMatrix = matrix; | |
| 798 } | |
| 799 | |
| 800 // this is not virtual, so it must call a virtual method so that subclasses | |
| 801 // will see its action | |
| 802 void SkCanvas::resetMatrix() { | |
| 803 SkMatrix matrix; | |
| 804 | |
| 805 matrix.reset(); | |
| 806 this->setMatrix(matrix); | |
| 807 } | |
| 808 | |
| 809 ////////////////////////////////////////////////////////////////////////////// | |
| 810 | |
| 811 bool SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op) { | |
| 812 fDeviceCMDirty = true; | |
| 813 fLocalBoundsCompareTypeDirty = true; | |
| 814 | |
| 815 if (fMCRec->fMatrix->rectStaysRect()) { | |
| 816 SkRect r; | |
| 817 SkIRect ir; | |
| 818 | |
| 819 fMCRec->fMatrix->mapRect(&r, rect); | |
| 820 r.round(&ir); | |
| 821 return fMCRec->fRegion->op(ir, op); | |
| 822 } else { | |
| 823 SkPath path; | |
| 824 | |
| 825 path.addRect(rect); | |
| 826 return this->clipPath(path, op); | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 bool SkCanvas::clipPath(const SkPath& path, SkRegion::Op op) { | |
| 831 fDeviceCMDirty = true; | |
| 832 fLocalBoundsCompareTypeDirty = true; | |
| 833 | |
| 834 SkPath devPath; | |
| 835 path.transform(*fMCRec->fMatrix, &devPath); | |
| 836 | |
| 837 if (SkRegion::kIntersect_Op == op) { | |
| 838 return fMCRec->fRegion->setPath(devPath, *fMCRec->fRegion); | |
| 839 } else { | |
| 840 SkRegion base; | |
| 841 const SkBitmap& bm = this->getDevice()->accessBitmap(false); | |
| 842 base.setRect(0, 0, bm.width(), bm.height()); | |
| 843 | |
| 844 if (SkRegion::kReplace_Op == op) { | |
| 845 return fMCRec->fRegion->setPath(devPath, base); | |
| 846 } else { | |
| 847 SkRegion rgn; | |
| 848 rgn.setPath(devPath, base); | |
| 849 return fMCRec->fRegion->op(rgn, op); | |
| 850 } | |
| 851 } | |
| 852 } | |
| 853 | |
| 854 bool SkCanvas::clipRegion(const SkRegion& rgn, SkRegion::Op op) { | |
| 855 fDeviceCMDirty = true; | |
| 856 fLocalBoundsCompareTypeDirty = true; | |
| 857 | |
| 858 return fMCRec->fRegion->op(rgn, op); | |
| 859 } | |
| 860 | |
| 861 void SkCanvas::computeLocalClipBoundsCompareType() const { | |
| 862 SkRect r; | |
| 863 | |
| 864 if (!this->getClipBounds(&r, kAA_EdgeType)) { | |
| 865 fLocalBoundsCompareType.setEmpty(); | |
| 866 } else { | |
| 867 fLocalBoundsCompareType.set(SkScalarToCompareType(r.fLeft), | |
| 868 SkScalarToCompareType(r.fTop), | |
| 869 SkScalarToCompareType(r.fRight), | |
| 870 SkScalarToCompareType(r.fBottom)); | |
| 871 } | |
| 872 } | |
| 873 | |
| 874 bool SkCanvas::quickReject(const SkRect& rect, EdgeType) const { | |
| 875 /* current impl ignores edgetype, and relies on | |
| 876 getLocalClipBoundsCompareType(), which always returns a value assuming | |
| 877 antialiasing (worst case) | |
| 878 */ | |
| 879 | |
| 880 if (fMCRec->fRegion->isEmpty()) { | |
| 881 return true; | |
| 882 } | |
| 883 | |
| 884 // check for empty user rect (horizontal) | |
| 885 SkScalarCompareType userL = SkScalarToCompareType(rect.fLeft); | |
| 886 SkScalarCompareType userR = SkScalarToCompareType(rect.fRight); | |
| 887 if (userL >= userR) { | |
| 888 return true; | |
| 889 } | |
| 890 | |
| 891 // check for empty user rect (vertical) | |
| 892 SkScalarCompareType userT = SkScalarToCompareType(rect.fTop); | |
| 893 SkScalarCompareType userB = SkScalarToCompareType(rect.fBottom); | |
| 894 if (userT >= userB) { | |
| 895 return true; | |
| 896 } | |
| 897 | |
| 898 // check if we are completely outside of the local clip bounds | |
| 899 const SkRectCompareType& clipR = this->getLocalClipBoundsCompareType(); | |
| 900 return userL >= clipR.fRight || userT >= clipR.fBottom || | |
| 901 userR <= clipR.fLeft || userB <= clipR.fTop; | |
| 902 } | |
| 903 | |
| 904 bool SkCanvas::quickReject(const SkPath& path, EdgeType et) const { | |
| 905 if (fMCRec->fRegion->isEmpty() || path.isEmpty()) { | |
| 906 return true; | |
| 907 } | |
| 908 | |
| 909 if (fMCRec->fMatrix->rectStaysRect()) { | |
| 910 SkRect r; | |
| 911 path.computeBounds(&r, SkPath::kFast_BoundsType); | |
| 912 return this->quickReject(r, et); | |
| 913 } | |
| 914 | |
| 915 SkPath dstPath; | |
| 916 SkRect r; | |
| 917 SkIRect ir; | |
| 918 | |
| 919 path.transform(*fMCRec->fMatrix, &dstPath); | |
| 920 dstPath.computeBounds(&r, SkPath::kFast_BoundsType); | |
| 921 r.round(&ir); | |
| 922 if (kAA_EdgeType == et) { | |
| 923 ir.inset(-1, -1); | |
| 924 } | |
| 925 return fMCRec->fRegion->quickReject(ir); | |
| 926 } | |
| 927 | |
| 928 bool SkCanvas::quickRejectY(SkScalar top, SkScalar bottom, EdgeType et) const { | |
| 929 /* current impl ignores edgetype, and relies on | |
| 930 getLocalClipBoundsCompareType(), which always returns a value assuming | |
| 931 antialiasing (worst case) | |
| 932 */ | |
| 933 | |
| 934 if (fMCRec->fRegion->isEmpty()) { | |
| 935 return true; | |
| 936 } | |
| 937 | |
| 938 SkScalarCompareType userT = SkScalarAs2sCompliment(top); | |
| 939 SkScalarCompareType userB = SkScalarAs2sCompliment(bottom); | |
| 940 | |
| 941 // check for invalid user Y coordinates (i.e. empty) | |
| 942 if (userT >= userB) { | |
| 943 return true; | |
| 944 } | |
| 945 | |
| 946 // check if we are above or below the local clip bounds | |
| 947 const SkRectCompareType& clipR = this->getLocalClipBoundsCompareType(); | |
| 948 return userT >= clipR.fBottom || userB <= clipR.fTop; | |
| 949 } | |
| 950 | |
| 951 bool SkCanvas::getClipBounds(SkRect* bounds, EdgeType et) const { | |
| 952 const SkRegion& clip = *fMCRec->fRegion; | |
| 953 if (clip.isEmpty()) { | |
| 954 if (bounds) { | |
| 955 bounds->setEmpty(); | |
| 956 } | |
| 957 return false; | |
| 958 } | |
| 959 | |
| 960 SkMatrix inverse; | |
| 961 // if we can't invert the CTM, we can't return local clip bounds | |
| 962 if (!fMCRec->fMatrix->invert(&inverse)) { | |
| 963 return false; | |
| 964 } | |
| 965 | |
| 966 if (NULL != bounds) { | |
| 967 SkRect r; | |
| 968 // get the clip's bounds | |
| 969 const SkIRect& ibounds = clip.getBounds(); | |
| 970 // adjust it outwards if we are antialiasing | |
| 971 int inset = (kAA_EdgeType == et); | |
| 972 r.iset(ibounds.fLeft - inset, ibounds.fTop - inset, | |
| 973 ibounds.fRight + inset, ibounds.fBottom + inset); | |
| 974 | |
| 975 // invert into local coordinates | |
| 976 inverse.mapRect(bounds, r); | |
| 977 } | |
| 978 return true; | |
| 979 } | |
| 980 | |
| 981 const SkMatrix& SkCanvas::getTotalMatrix() const { | |
| 982 return *fMCRec->fMatrix; | |
| 983 } | |
| 984 | |
| 985 const SkRegion& SkCanvas::getTotalClip() const { | |
| 986 return *fMCRec->fRegion; | |
| 987 } | |
| 988 | |
| 989 /////////////////////////////////////////////////////////////////////////////// | |
| 990 | |
| 991 SkDevice* SkCanvas::createDevice(SkBitmap::Config config, int width, | |
| 992 int height, bool isOpaque, bool isForLayer) { | |
| 993 SkBitmap bitmap; | |
| 994 | |
| 995 bitmap.setConfig(config, width, height); | |
| 996 bitmap.setIsOpaque(isOpaque); | |
| 997 | |
| 998 // should this happen in the device subclass? | |
| 999 bitmap.allocPixels(); | |
| 1000 if (!bitmap.isOpaque()) { | |
| 1001 bitmap.eraseARGB(0, 0, 0, 0); | |
| 1002 } | |
| 1003 | |
| 1004 return SkNEW_ARGS(SkDevice, (bitmap)); | |
| 1005 } | |
| 1006 | |
| 1007 ////////////////////////////////////////////////////////////////////////////// | |
| 1008 // These are the virtual drawing methods | |
| 1009 ////////////////////////////////////////////////////////////////////////////// | |
| 1010 | |
| 1011 void SkCanvas::drawPaint(const SkPaint& paint) { | |
| 1012 ITER_BEGIN(paint, SkDrawFilter::kPaint_Type) | |
| 1013 | |
| 1014 while (iter.next()) { | |
| 1015 iter.fDevice->drawPaint(iter, paint); | |
| 1016 } | |
| 1017 | |
| 1018 ITER_END | |
| 1019 } | |
| 1020 | |
| 1021 void SkCanvas::drawPoints(PointMode mode, size_t count, const SkPoint pts[], | |
| 1022 const SkPaint& paint) { | |
| 1023 if ((long)count <= 0) { | |
| 1024 return; | |
| 1025 } | |
| 1026 | |
| 1027 SkASSERT(pts != NULL); | |
| 1028 | |
| 1029 ITER_BEGIN(paint, SkDrawFilter::kPoint_Type) | |
| 1030 | |
| 1031 while (iter.next()) { | |
| 1032 iter.fDevice->drawPoints(iter, mode, count, pts, paint); | |
| 1033 } | |
| 1034 | |
| 1035 ITER_END | |
| 1036 } | |
| 1037 | |
| 1038 void SkCanvas::drawRect(const SkRect& r, const SkPaint& paint) { | |
| 1039 if (paint.canComputeFastBounds()) { | |
| 1040 SkRect storage; | |
| 1041 if (this->quickReject(paint.computeFastBounds(r, &storage), | |
| 1042 paint2EdgeType(&paint))) { | |
| 1043 return; | |
| 1044 } | |
| 1045 } | |
| 1046 | |
| 1047 ITER_BEGIN(paint, SkDrawFilter::kRect_Type) | |
| 1048 | |
| 1049 while (iter.next()) { | |
| 1050 iter.fDevice->drawRect(iter, r, paint); | |
| 1051 } | |
| 1052 | |
| 1053 ITER_END | |
| 1054 } | |
| 1055 | |
| 1056 void SkCanvas::drawPath(const SkPath& path, const SkPaint& paint) { | |
| 1057 if (paint.canComputeFastBounds()) { | |
| 1058 SkRect r; | |
| 1059 path.computeBounds(&r, SkPath::kFast_BoundsType); | |
| 1060 if (this->quickReject(paint.computeFastBounds(r, &r), | |
| 1061 paint2EdgeType(&paint))) { | |
| 1062 return; | |
| 1063 } | |
| 1064 } | |
| 1065 | |
| 1066 ITER_BEGIN(paint, SkDrawFilter::kPath_Type) | |
| 1067 | |
| 1068 while (iter.next()) { | |
| 1069 iter.fDevice->drawPath(iter, path, paint); | |
| 1070 } | |
| 1071 | |
| 1072 ITER_END | |
| 1073 } | |
| 1074 | |
| 1075 void SkCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y, | |
| 1076 const SkPaint* paint) { | |
| 1077 SkDEBUGCODE(bitmap.validate();) | |
| 1078 | |
| 1079 if (NULL == paint || (paint->getMaskFilter() == NULL)) { | |
| 1080 SkRect fastBounds; | |
| 1081 fastBounds.set(x, y, | |
| 1082 x + SkIntToScalar(bitmap.width()), | |
| 1083 y + SkIntToScalar(bitmap.height())); | |
| 1084 if (this->quickReject(fastBounds, paint2EdgeType(paint))) { | |
| 1085 return; | |
| 1086 } | |
| 1087 } | |
| 1088 | |
| 1089 SkMatrix matrix; | |
| 1090 matrix.setTranslate(x, y); | |
| 1091 this->internalDrawBitmap(bitmap, matrix, paint); | |
| 1092 } | |
| 1093 | |
| 1094 void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, | |
| 1095 const SkRect& dst, const SkPaint* paint) { | |
| 1096 if (bitmap.width() == 0 || bitmap.height() == 0 || dst.isEmpty()) { | |
| 1097 return; | |
| 1098 } | |
| 1099 | |
| 1100 // do this now, to avoid the cost of calling extract for RLE bitmaps | |
| 1101 if (this->quickReject(dst, paint2EdgeType(paint))) { | |
| 1102 return; | |
| 1103 } | |
| 1104 | |
| 1105 SkBitmap tmp; // storage if we need a subset of bitmap | |
| 1106 const SkBitmap* bitmapPtr = &bitmap; | |
| 1107 | |
| 1108 if (NULL != src) { | |
| 1109 if (!bitmap.extractSubset(&tmp, *src)) { | |
| 1110 return; // extraction failed | |
| 1111 } | |
| 1112 bitmapPtr = &tmp; | |
| 1113 } | |
| 1114 | |
| 1115 SkScalar width = SkIntToScalar(bitmapPtr->width()); | |
| 1116 SkScalar height = SkIntToScalar(bitmapPtr->height()); | |
| 1117 SkMatrix matrix; | |
| 1118 | |
| 1119 if (dst.width() == width && dst.height() == height) { | |
| 1120 matrix.setTranslate(dst.fLeft, dst.fTop); | |
| 1121 } else { | |
| 1122 SkRect tmpSrc; | |
| 1123 tmpSrc.set(0, 0, width, height); | |
| 1124 matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit); | |
| 1125 } | |
| 1126 this->internalDrawBitmap(*bitmapPtr, matrix, paint); | |
| 1127 } | |
| 1128 | |
| 1129 void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix, | |
| 1130 const SkPaint* paint) { | |
| 1131 SkDEBUGCODE(bitmap.validate();) | |
| 1132 this->internalDrawBitmap(bitmap, matrix, paint); | |
| 1133 } | |
| 1134 | |
| 1135 void SkCanvas::commonDrawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, | |
| 1136 const SkPaint& paint) { | |
| 1137 SkDEBUGCODE(bitmap.validate();) | |
| 1138 | |
| 1139 ITER_BEGIN(paint, SkDrawFilter::kBitmap_Type) | |
| 1140 | |
| 1141 while (iter.next()) { | |
| 1142 iter.fDevice->drawBitmap(iter, bitmap, matrix, paint); | |
| 1143 } | |
| 1144 | |
| 1145 ITER_END | |
| 1146 } | |
| 1147 | |
| 1148 void SkCanvas::drawSprite(const SkBitmap& bitmap, int x, int y, | |
| 1149 const SkPaint* paint) { | |
| 1150 SkDEBUGCODE(bitmap.validate();) | |
| 1151 | |
| 1152 if (reject_bitmap(bitmap)) { | |
| 1153 return; | |
| 1154 } | |
| 1155 | |
| 1156 SkPaint tmp; | |
| 1157 if (NULL == paint) { | |
| 1158 paint = &tmp; | |
| 1159 } | |
| 1160 | |
| 1161 ITER_BEGIN(*paint, SkDrawFilter::kBitmap_Type) | |
| 1162 | |
| 1163 while (iter.next()) { | |
| 1164 iter.fDevice->drawSprite(iter, bitmap, x - iter.getX(), y - iter.getY(), | |
| 1165 *paint); | |
| 1166 } | |
| 1167 ITER_END | |
| 1168 } | |
| 1169 | |
| 1170 void SkCanvas::drawText(const void* text, size_t byteLength, | |
| 1171 SkScalar x, SkScalar y, const SkPaint& paint) { | |
| 1172 ITER_BEGIN(paint, SkDrawFilter::kText_Type) | |
| 1173 | |
| 1174 while (iter.next()) { | |
| 1175 iter.fDevice->drawText(iter, text, byteLength, x, y, paint); | |
| 1176 } | |
| 1177 | |
| 1178 ITER_END | |
| 1179 } | |
| 1180 | |
| 1181 void SkCanvas::drawPosText(const void* text, size_t byteLength, | |
| 1182 const SkPoint pos[], const SkPaint& paint) { | |
| 1183 ITER_BEGIN(paint, SkDrawFilter::kText_Type) | |
| 1184 | |
| 1185 while (iter.next()) { | |
| 1186 iter.fDevice->drawPosText(iter, text, byteLength, &pos->fX, 0, 2, | |
| 1187 paint); | |
| 1188 } | |
| 1189 | |
| 1190 ITER_END | |
| 1191 } | |
| 1192 | |
| 1193 void SkCanvas::drawPosTextH(const void* text, size_t byteLength, | |
| 1194 const SkScalar xpos[], SkScalar constY, | |
| 1195 const SkPaint& paint) { | |
| 1196 ITER_BEGIN(paint, SkDrawFilter::kText_Type) | |
| 1197 | |
| 1198 while (iter.next()) { | |
| 1199 iter.fDevice->drawPosText(iter, text, byteLength, xpos, constY, 1, | |
| 1200 paint); | |
| 1201 } | |
| 1202 | |
| 1203 ITER_END | |
| 1204 } | |
| 1205 | |
| 1206 void SkCanvas::drawTextOnPath(const void* text, size_t byteLength, | |
| 1207 const SkPath& path, const SkMatrix* matrix, | |
| 1208 const SkPaint& paint) { | |
| 1209 ITER_BEGIN(paint, SkDrawFilter::kText_Type) | |
| 1210 | |
| 1211 while (iter.next()) { | |
| 1212 iter.fDevice->drawTextOnPath(iter, text, byteLength, path, | |
| 1213 matrix, paint); | |
| 1214 } | |
| 1215 | |
| 1216 ITER_END | |
| 1217 } | |
| 1218 | |
| 1219 void SkCanvas::drawVertices(VertexMode vmode, int vertexCount, | |
| 1220 const SkPoint verts[], const SkPoint texs[], | |
| 1221 const SkColor colors[], SkXfermode* xmode, | |
| 1222 const uint16_t indices[], int indexCount, | |
| 1223 const SkPaint& paint) { | |
| 1224 ITER_BEGIN(paint, SkDrawFilter::kPath_Type) | |
| 1225 | |
| 1226 while (iter.next()) { | |
| 1227 iter.fDevice->drawVertices(iter, vmode, vertexCount, verts, texs, | |
| 1228 colors, xmode, indices, indexCount, paint); | |
| 1229 } | |
| 1230 | |
| 1231 ITER_END | |
| 1232 } | |
| 1233 | |
| 1234 ////////////////////////////////////////////////////////////////////////////// | |
| 1235 // These methods are NOT virtual, and therefore must call back into virtual | |
| 1236 // methods, rather than actually drawing themselves. | |
| 1237 ////////////////////////////////////////////////////////////////////////////// | |
| 1238 | |
| 1239 void SkCanvas::drawARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b, | |
| 1240 SkPorterDuff::Mode mode) { | |
| 1241 SkPaint paint; | |
| 1242 | |
| 1243 paint.setARGB(a, r, g, b); | |
| 1244 if (SkPorterDuff::kSrcOver_Mode != mode) { | |
| 1245 paint.setPorterDuffXfermode(mode); | |
| 1246 } | |
| 1247 this->drawPaint(paint); | |
| 1248 } | |
| 1249 | |
| 1250 void SkCanvas::drawColor(SkColor c, SkPorterDuff::Mode mode) { | |
| 1251 SkPaint paint; | |
| 1252 | |
| 1253 paint.setColor(c); | |
| 1254 if (SkPorterDuff::kSrcOver_Mode != mode) { | |
| 1255 paint.setPorterDuffXfermode(mode); | |
| 1256 } | |
| 1257 this->drawPaint(paint); | |
| 1258 } | |
| 1259 | |
| 1260 void SkCanvas::drawPoint(SkScalar x, SkScalar y, const SkPaint& paint) { | |
| 1261 SkPoint pt; | |
| 1262 | |
| 1263 pt.set(x, y); | |
| 1264 this->drawPoints(kPoints_PointMode, 1, &pt, paint); | |
| 1265 } | |
| 1266 | |
| 1267 void SkCanvas::drawPoint(SkScalar x, SkScalar y, SkColor color) { | |
| 1268 SkPoint pt; | |
| 1269 SkPaint paint; | |
| 1270 | |
| 1271 pt.set(x, y); | |
| 1272 paint.setColor(color); | |
| 1273 this->drawPoints(kPoints_PointMode, 1, &pt, paint); | |
| 1274 } | |
| 1275 | |
| 1276 void SkCanvas::drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, | |
| 1277 const SkPaint& paint) { | |
| 1278 SkPoint pts[2]; | |
| 1279 | |
| 1280 pts[0].set(x0, y0); | |
| 1281 pts[1].set(x1, y1); | |
| 1282 this->drawPoints(kLines_PointMode, 2, pts, paint); | |
| 1283 } | |
| 1284 | |
| 1285 void SkCanvas::drawRectCoords(SkScalar left, SkScalar top, | |
| 1286 SkScalar right, SkScalar bottom, | |
| 1287 const SkPaint& paint) { | |
| 1288 SkRect r; | |
| 1289 | |
| 1290 r.set(left, top, right, bottom); | |
| 1291 this->drawRect(r, paint); | |
| 1292 } | |
| 1293 | |
| 1294 void SkCanvas::drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, | |
| 1295 const SkPaint& paint) { | |
| 1296 if (radius < 0) { | |
| 1297 radius = 0; | |
| 1298 } | |
| 1299 | |
| 1300 SkRect r; | |
| 1301 r.set(cx - radius, cy - radius, cx + radius, cy + radius); | |
| 1302 | |
| 1303 if (paint.canComputeFastBounds()) { | |
| 1304 SkRect storage; | |
| 1305 if (this->quickReject(paint.computeFastBounds(r, &storage), | |
| 1306 paint2EdgeType(&paint))) { | |
| 1307 return; | |
| 1308 } | |
| 1309 } | |
| 1310 | |
| 1311 SkPath path; | |
| 1312 path.addOval(r); | |
| 1313 this->drawPath(path, paint); | |
| 1314 } | |
| 1315 | |
| 1316 void SkCanvas::drawRoundRect(const SkRect& r, SkScalar rx, SkScalar ry, | |
| 1317 const SkPaint& paint) { | |
| 1318 if (rx > 0 && ry > 0) { | |
| 1319 if (paint.canComputeFastBounds()) { | |
| 1320 SkRect storage; | |
| 1321 if (this->quickReject(paint.computeFastBounds(r, &storage), | |
| 1322 paint2EdgeType(&paint))) { | |
| 1323 return; | |
| 1324 } | |
| 1325 } | |
| 1326 | |
| 1327 SkPath path; | |
| 1328 path.addRoundRect(r, rx, ry, SkPath::kCW_Direction); | |
| 1329 this->drawPath(path, paint); | |
| 1330 } else { | |
| 1331 this->drawRect(r, paint); | |
| 1332 } | |
| 1333 } | |
| 1334 | |
| 1335 void SkCanvas::drawOval(const SkRect& oval, const SkPaint& paint) { | |
| 1336 if (paint.canComputeFastBounds()) { | |
| 1337 SkRect storage; | |
| 1338 if (this->quickReject(paint.computeFastBounds(oval, &storage), | |
| 1339 paint2EdgeType(&paint))) { | |
| 1340 return; | |
| 1341 } | |
| 1342 } | |
| 1343 | |
| 1344 SkPath path; | |
| 1345 path.addOval(oval); | |
| 1346 this->drawPath(path, paint); | |
| 1347 } | |
| 1348 | |
| 1349 void SkCanvas::drawArc(const SkRect& oval, SkScalar startAngle, | |
| 1350 SkScalar sweepAngle, bool useCenter, | |
| 1351 const SkPaint& paint) { | |
| 1352 if (SkScalarAbs(sweepAngle) >= SkIntToScalar(360)) { | |
| 1353 this->drawOval(oval, paint); | |
| 1354 } else { | |
| 1355 SkPath path; | |
| 1356 if (useCenter) { | |
| 1357 path.moveTo(oval.centerX(), oval.centerY()); | |
| 1358 } | |
| 1359 path.arcTo(oval, startAngle, sweepAngle, !useCenter); | |
| 1360 if (useCenter) { | |
| 1361 path.close(); | |
| 1362 } | |
| 1363 this->drawPath(path, paint); | |
| 1364 } | |
| 1365 } | |
| 1366 | |
| 1367 void SkCanvas::drawTextOnPathHV(const void* text, size_t byteLength, | |
| 1368 const SkPath& path, SkScalar hOffset, | |
| 1369 SkScalar vOffset, const SkPaint& paint) { | |
| 1370 SkMatrix matrix; | |
| 1371 | |
| 1372 matrix.setTranslate(hOffset, vOffset); | |
| 1373 this->drawTextOnPath(text, byteLength, path, &matrix, paint); | |
| 1374 } | |
| 1375 | |
| 1376 void SkCanvas::drawPicture(SkPicture& picture) { | |
| 1377 int saveCount = save(); | |
| 1378 picture.draw(this); | |
| 1379 restoreToCount(saveCount); | |
| 1380 } | |
| 1381 | |
| 1382 /////////////////////////////////////////////////////////////////////////////// | |
| 1383 /////////////////////////////////////////////////////////////////////////////// | |
| 1384 | |
| 1385 SkCanvas::LayerIter::LayerIter(SkCanvas* canvas, bool skipEmptyClips) { | |
| 1386 // need COMPILE_TIME_ASSERT | |
| 1387 SkASSERT(sizeof(fStorage) >= sizeof(SkDrawIter)); | |
| 1388 | |
| 1389 SkASSERT(canvas); | |
| 1390 | |
| 1391 fImpl = new (fStorage) SkDrawIter(canvas, skipEmptyClips); | |
| 1392 fDone = !fImpl->next(); | |
| 1393 } | |
| 1394 | |
| 1395 SkCanvas::LayerIter::~LayerIter() { | |
| 1396 fImpl->~SkDrawIter(); | |
| 1397 } | |
| 1398 | |
| 1399 void SkCanvas::LayerIter::next() { | |
| 1400 fDone = !fImpl->next(); | |
| 1401 } | |
| 1402 | |
| 1403 SkDevice* SkCanvas::LayerIter::device() const { | |
| 1404 return fImpl->getDevice(); | |
| 1405 } | |
| 1406 | |
| 1407 const SkMatrix& SkCanvas::LayerIter::matrix() const { | |
| 1408 return fImpl->getMatrix(); | |
| 1409 } | |
| 1410 | |
| 1411 const SkPaint& SkCanvas::LayerIter::paint() const { | |
| 1412 const SkPaint* paint = fImpl->getPaint(); | |
| 1413 if (NULL == paint) { | |
| 1414 paint = &fDefaultPaint; | |
| 1415 } | |
| 1416 return *paint; | |
| 1417 } | |
| 1418 | |
| 1419 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); } | |
| 1420 int SkCanvas::LayerIter::x() const { return fImpl->getX(); } | |
| 1421 int SkCanvas::LayerIter::y() const { return fImpl->getY(); } | |
| 1422 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/